The CKM CP phase is expressed as a fourth-order rephasing invariant constructed from the down-quark mass matrix and its inverse via perturbative singular value decomposition.
Vives,Flavor dependence of CP asymmetries and thermal leptogenesis with strong right- handed neutrino mass hierarchy, Phys
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abstract
We prove that taking correctly into account the lepton flavour dependence of the CP asymmetries and washout processes, it is possible to obtain successful thermal leptogenesis from the decays of the second right-handed neutrino. The asymmetries in the muon and tau-flavour channels are then not erased by the inverse decays of the lightest right-handed neutrino, N_1. In this way, we reopen the possibility of ``thermal leptogenesis'' in models with a strong hierarchy in the right-handed Majorana masses that is typically the case in models with up-quark--neutrino Yukawa unification.
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SO(10)-inspired leptogenesis implies N2-leptogenesis, ruling out inverted neutrino ordering under strict conditions and enabling initial-condition-independent asymmetry in subsets of solutions.
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Perturbative determination of CP phase in CKM matrix using rephasing invariants of hierarchical mass matrices and their inverses
The CKM CP phase is expressed as a fourth-order rephasing invariant constructed from the down-quark mass matrix and its inverse via perturbative singular value decomposition.
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$SO(10)$-inspired leptogenesis
SO(10)-inspired leptogenesis implies N2-leptogenesis, ruling out inverted neutrino ordering under strict conditions and enabling initial-condition-independent asymmetry in subsets of solutions.